Quick Answer
The Tesla Model Y remains the family EV SUV benchmark — its Supercharger network, software maturity, and resale values are hard to beat. The BYD Sealion 7 undercuts the Model Y by around £6,000 for the entry RWD version, offers competitive range, and comes with BYD’s 6-year vehicle warranty. It’s the most credible alternative to the Model Y available today.
Price Comparison
| BYD Sealion 7 RWD | Tesla Model Y RWD | |
|---|---|---|
| UK price | £44,695 | £44,990 |
| AWD/Performance price | £48,695 | £54,990 |
| Warranty (vehicle) | 6 years | 4 years |
At RWD level, the prices are now surprisingly close. At the AWD/Performance tier, Tesla commands a significant premium.
Range Comparison
| Sealion 7 RWD | Sealion 7 AWD | Model Y RWD | Model Y Long Range AWD | |
|---|---|---|---|---|
| WLTP range | 323 miles | 305 miles | 331 miles | 373 miles |
| Real-world motorway | 225–260 miles | 210–245 miles | 240–275 miles | 280–320 miles |
Range is broadly comparable at RWD level. The Model Y Long Range AWD is significantly longer-ranging than the Sealion 7 AWD.
Charging Comparison
| BYD Sealion 7 | Tesla Model Y | |
|---|---|---|
| Max DC charge | 150 kW | 250 kW (V3 Supercharger) |
| 10–80% time | ~26 min | ~20 min (V3) |
| Network | CCS open network | Supercharger + CCS |
| Charging reliability | Variable (third-party) | High (Supercharger) |
Tesla’s 250 kW peak charging and the Supercharger network remain clear advantages. The Model Y recharges faster and more reliably on long trips.
Winner: Tesla Model Y, clearly.
Interior and Space
| BYD Sealion 7 | Tesla Model Y | |
|---|---|---|
| Boot (5 seat) | 520 L | 854 L (with 76 L frunk) |
| 7-seat option | No | Yes (optional, £3,000) |
| Rear legroom | Excellent | Excellent |
| Main screen | 15.6” | 15.4” |
| Driver display | 12.3” | None (HUD only) |
The Model Y has a substantially larger boot — 854 litres vs 520 litres — and the option of 7 seats. This is a significant practical advantage for families.
Winner: Tesla Model Y on practicality.
Software and Technology
Tesla’s advantage in software is real and meaningful. The Model Y receives regular OTA updates that add features and refine performance. The energy management and routing software is genuinely class-leading.
BYD’s DiLink system is competent but less mature. Updates are less frequent and less comprehensive.
Winner: Tesla Model Y.
Warranty
| BYD Sealion 7 | Tesla Model Y | |
|---|---|---|
| Vehicle warranty | 6 years / 150,000 miles | 4 years / 50,000 miles |
| Battery warranty | 8 years / 100,000 miles | 8 years / 150,000 miles |
Tesla’s vehicle warranty is notably short. BYD’s 6-year/150,000-mile cover provides greater peace of mind — particularly for second-hand buyers.
Winner: BYD Sealion 7.
Autopilot vs ADAS
Tesla’s Autopilot is a capable highway driving assistance system. BYD’s suite of safety and driver assistance features is comprehensive but does not match Tesla’s highway capability.
Winner: Tesla Model Y.
Resale Value
Tesla Model Y residual values are strong and well-established. BYD’s residual values are harder to predict as the brand is newer to the market.
Winner: Tesla Model Y.
Which Should You Buy?
Choose the BYD Sealion 7 if you:
- Want to maximise the car-for-money equation
- Charge primarily at home and rarely do long motorway trips
- Need a 5-seat family SUV and don’t need 7 seats
- Value a longer vehicle warranty and LFP battery durability
- Are comfortable with a newer brand’s dealership network
Choose the Tesla Model Y if you:
- Regularly travel long distances and rely on public rapid charging
- Want the most capable OTA software updates
- Need the 7-seat option for a larger family
- Value stronger resale values for PCP finance
- Want the most mature EV ownership experience
Final Verdict
The BYD Sealion 7 is the most compelling challenger to the Tesla Model Y in 2025 — but it hasn’t overtaken it. Tesla’s advantages in software, fast charging, boot space, and resale value are real. The Sealion 7’s advantages — price, LFP battery, and warranty — are meaningful. For city and suburban families who charge at home, the Sealion 7 offers excellent value. For high-mileage drivers who regularly travel the UK’s motorway network, the Model Y is still the more practical long-term choice.